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@kennethreitz I am going to do this now. Looking at putting [this link](https://docs.python.org/3.6/library/exceptions.html#exception-hierarchy) with some explainer context on the [Structure page](http://docs.python-guide.org/en/latest/writing/structure/), after Mutable and Immutable Types. Secondly, adding [this](http://www.pythonforbeginners.com/error-handling/python-errors-and-exceptions/) from...